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Ecological risk assessment of arsenic and metals in sediments of coastal areas of northern Bohai and Yellow Seas China

机译：渤海北部和黄海沿岸沉积物中砷和金属的生态风险评估

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摘要

Distributions of arsenic and metals in surface sediments collected from the coastal and estuarine areas of the northern Bohai and Yellow Seas, China, were investigated. An ecological risk assessment of arsenic and metals in the sediments was evaluated by three approaches: the Sediment Quality Guidelines (SQGs) of the United States Environmental Protection Agency (USEPA), the degree of contamination, and two sets of SQGs indices. Sediments from the estuaries of the Wuli and Yalu Rivers contained some of the greatest concentrations of arsenic, cadmium, copper, mercury, lead, and zinc. Median concentrations of cadmium and mean concentrations of lead and zinc were greater than background concentrations determined for the areas. All sediments were considered to be heavily polluted by arsenic, but moderately polluted by chromium, lead, and cadmium. Current concentrations of arsenic and metals are unlikely to be acutely toxic, but chronic exposures would be expected to cause adverse effects on benthic invertebrates at 31.4% of the sites.
机译：研究了从中国渤海和黄海北部沿海和河口地区收集的表层沉积物中砷和金属的分布。通过三种方法对沉积物中砷和金属的生态风险评估进行了评估：美国环境保护局（USEPA）的《沉积物质量准则》（SQGs），污染程度以及两组SQGs指数。五里河和鸭绿江河口的泥沙中砷，镉，铜，汞，铅和锌的含量最高。镉的中位数浓度以及铅和锌的平均浓度大于该区域确定的背景浓度。认为所有沉积物都被砷重度污染，但被铬，铅和镉中度污染。当前砷和金属的浓度不可能具有剧毒，但预计长期接触会对31.4％的底栖无脊椎动物产生不利影响。

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